v0.8.1

What's Changed

Added

• Semantic off-topic gate: _semantic_divergence() in CoherenceScorer uses sentence-transformers cosine similarity to detect off-topic responses before falling through to string-match for value accuracy
• Directory ingestion: VectorGroundTruthStore.ingest_from_directory(path, glob) recursively reads .txt, .md, and .jsonl files

Changed

• ChromaBackend now requires sentence-transformers (raises ImportError instead of silent fallback)
• Factual scoring cascade: NLI → semantic gate (off-topic detection) → string match
• README: removed pending benchmark placeholders, condensed research section

Details

• 397 tests passing, ruff clean
• Full changelog: CHANGELOG.md